KLB33

I am having issues with my AC. Went out (blew hot air) intermittently for a while, then started always blowing hot air. I had my mechanic check the compressor (running correctly at about 250/40) and the freon (had a minor leak that was fixed). After searching online and the forum, we decided it was probably the evap temp sensor. My mechanic was unable to change it, so a friend and I changed it. The air blew cold that night after changing it, but then started blowing hot again the next day. I then searched the forum some more and found the issues with the blend door actuator. Somewhere (I was researching for a LONG time) I saw a statement to turn the air knob all the way to hot, and click by click turn it to cold. This works temporarily. I am searching of any advice on if it does sound like it might be the blend door actuator. If so, if anyone possibly knows which actual part I would purchase. The parts on the Ford website are listed as the blend door motor cam, blend door motor level, blend door motor temperature mode actuator and blend door motor air inlet (recirculation). Or, perhaps someone has an idea of something else it could be! Any help would be greatly appreciated as at this time, I simply can't afford to take it to the dealership. Thanks in advance!!!